SCP-073 - “Cain”
There is a symbol engraved into the forehead of the subject, which appears to be of Sumerian origin. Symbol has of yet been untranslated, and subject appears distressed when the symbol is mentioned at all, refusing to speak on it.
SCP-070 - Iron Wings
The wings of SCP-070 appear to act independently of the person they are attached to, and SCP-070 has stated repeatedly that it has no control over them.
SCP-068 - The Wire Figure
Once metal has been found, SCP-068 will begin to knead it and pull a thin strip of metal off of it. SCP-068 will then construct another figure similar to itself.
SCP-SAFE-J - Some Safes
Dr. Safe is in charge of the Safe safe, Dr. Euclid is in charge of the Euclid safe, and Dr. Keter helps with both the Safe safe and the Euclid safe.
SCP-005 - Skeleton Key
SCP-005 seems to have the unique ability to open any and all forms of lock, be they mechanical or digital, with relative ease.